Pglast

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- Implement ``NamedArgExpr`` printer

- New alternative printers for a set of *special functions*, activated by a new
``--special-functions`` option on ``pgpp`` (`issue 2`__)

__ https://github.com/lelit/pglast/issues/2

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- Handle special de-reference (``A_Indirection``) cases

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- Fix serialization of column labels containing double quotes

- Fix corner issues surfaced implementing some more DDL statement printers

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- Fix endless loop due to sloppy conversion of command line option

- Install the command line tool as ``pgpp``

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- Rename printers.sql to printers.dml (**backward incompatibility**)

- List printer functions in the documentation, referencing the definition of related node type

- Fix inconsistent spacing in JOIN condition inside a nested expression

- Fix representation of unbound arrays

- Fix representation of ``interval`` data type

- Initial support for DDL statements

- Fix representation of string literals containing single quotes

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- Update libpg_query to 10-1.0.0